Introduction For two days, on the 14th and 15th of April, a field excursion to Hastings Point, New South Wales was conducted. At Hastings Point, topography, abiotic factors and organism distribution were measured and recorded, with the aim of drawing links between the abiotic factors of two ecosystems (rocky shore and sand dunes), the organisms which live in them, and the adaptations they have developed to cope with these conditions. Within these two ecosystems, multiple zones were identified and recorded, and this report also aims to identify the factors and organisms associated with each zone. Lastly, using data and observations from the past, predictions for the future of the rock pool ecosystem were made.
The lab started off by measuring critical materials for the lab: the mass of an an empty 100 mL beaker, mass of beaker and copper chloride together(52.30 g), and the mass of three iron nails(2.73 g). The goal of this experiment is to determine the number of moles of copper and iron that would be produced in the reaction of iron and copper(II) chloride, the ratio of moles of iron to moles of copper, and the percent yield of copper produced. 2.00 grams of copper(II) chloride was added in the beaker to mix with 15 mL of distilled water. Then, three dry nails are placed in the copper(II) chloride solution for approximately 25 minutes. The three nails have to be scraped clean by sandpaper to make the surface of the nail shiny; if the nails are not clean, then some unknown substances might accidentally mix into the reaction and cause variations of the result.
K.D.A. Saboia et al. , (2007) have been prepared the Bi4Ti3O12–CaCu3Ti4O12 {[BIT(X)–CCTO(100-X)]} composite powders through solid state reaction method and calcined in the range of 900 to 1020 ºC for 12 h. The as-prepared powders have modified in the form of thick film onto alumina ceramic substrate by utilizing screen printing. At 100 Hz, the value of dielectric constant (κ) of CCTO100 and BIT100 is 316.61 and 53.64 respectively. Conversely, the composite with X=20 % shows an unexpected dielectric constant of 409.71, which is around 20% higher in comparison with the CCTO.
In a Beacon School, located in NYC, two-tenth - graders were seriously injured, leaving a boy with critical burns and another student with fewer server burns from her neck, head, and arm. Anna Peole, chemistry teacher was showing a “demonstration of rainbow flames” which will result burning of 4 different kinds of nitrates in separate crucibles in the classroom. However, the unstable amount of methyl alcohol hazes around the chemistry lab and explodes across the lab table surrounding Alonzo Yanes, a sophomore at the Beacon School. Alonzo Yanes was standing a few feet away from the lab table, where the crucibles were.
There are two parts to fire investigations: the fire scene investigation, followed by the fire debris analysis. In the fire investigation phase, the primary focus must be to determine the origin(s) and cause(s) of the fire. The origin and cause are irrevocably connected: if the origin cannot be determined, then the cause cannot be determined, and further, if the origin determination is incorrect, the cause determination will also be incorrect. The fire debris analysis, more so like other forensic sciences, takes place in a lab where analysts attempt to determine whether ignitable liquid residues (“ILR”) are present, and if so, what the chemical nature of these ILRs are, and whether potential accelerants are found on the samples. Upon arriving at the scene, investigators will often use a combination of the following sources to determine the origin of a fire: witness information and/or electronic data, fire patterns, arc mapper, and fire dynamics.
FlRE HAZARDS ASSESSMENT AND CONTROL Fire is caused by the interaction of three elements, known as the fire triangle: heat, fuel and oxygen. The fire triangle is fundamental to understanding the prevention, control and extinction of fire. Fire spreads by means of direct burning, heat radiation, conduction and convection. Fires are classified into five categories based on the fuel type. This classification is fundamental to identifying the means by which each type of fire may be extinguished.
Gunpowder is made up of saltpeter- a common name for the oxidizing agent potassium nitrate- sulfur and charcoal (Heather Whipps, 2008). When the Chinese scientists first mixed the ingredients together it resulted in smoke and flames, causing their hands and faces to burn (Heather Whipps, 2008). One of the first
As the step rocket burned out and fell off in the sky, the firework would continue going much farther than it would have normally gone. This technology is still used in rockets today, and is in part responsible for our vast improvement in rocket technology. According to nasa.gov, in the 17th century, Isaac newton created three laws of motion. These collectively explained how rockets could move in space, and how they could one day be used for space
A flamethrower is a device designed to project flames and massive clouds of smoke in a controlled manner during wars. It was mostly used in battlefields, fortifications, bunkers and any other closed or shielding location. It was used because it can jet out flames up to 20 yards away from where the person controlling it is standing. It was also created to be carried and used by a single soldier. The device was first used on February 26, 1915 by the German 3rd pioneer regiment.
Hypothesis: Increasing substrate concentration will increase the initial reaction rate until it stops increasing and flattens out. Independent Variable: Substrate concentration Dependent Variable: The substrate itself, 1.0% Hydrogen Peroxide How Dependent Variable will be Measured: Hydrogen Peroxide will be used in every experiment, just with different test tubes. The amount of Hydrogen Peroxide in the mixing table is the amount that will be added to each test tube.
The flames create a visual demonstration of the sound wave as it travels through the standing wave. On account of displacement, nodes correspond to pressure antinodes, and displacement antinodes correspond to pressure nodes. Causing the flames to react. Notwithstanding other outside factors.
Introduction The purpose of this lab is to use control variables to help identify different macromolecules. Biological systems are made up of these four major macromolecules: carbohydrates, lipids, proteins and nucleic acids. Carbohydrates are sugar molecules (monosaccharides, disaccharides, and polysaccharides) which make them the most abundant macromolecule on the earth. Lipids (oils and fats, phospholipids and steroids) are insoluble in water and perform many functions such as energy source, essential nutrients, hormones and insulators (Lehman, 1955).
Difference Between Origin and Fire Cause Determination. Today in this paper I am going to write about the major differences between the origin of a fire or explosion, and the cause and determination of a fire. I will first separate the two subjects, then give a few examples of clear differences between them, give a partial scenario, and a conclusion to hopefully give a clear meaning to both terms. Now without further due, I would like to present my thoughts and findings about determining the fire’s origin.
• Fires will spread rapidly and increase in intensity quickly after ignition. • Small fires can quickly become large fires and exhibit extreme fire behavior. • Fires will be difficult to control and will often become much larger and longer-lasting. Extreme Red • Fires of all types start quickly and burn intensely.
Hydrogen gas frequently burns in the air but they aren 't as hot as gasoline fires. Also, hydrogen gas are less likely to cause another fires immediately
